1766-RM001A-EN-P MicroLogix 1400 Programmable Controllers ...

ASCII Instructions 365String Data File StructureString ElementBit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00Word upper byte lower byte0 String Length - number of characters (range is from 0…82)1 character 0 character 12 character 2 character 3↓ ↓ ↓40 character 78 character 7941 character 80 character 81Addressing String FilesThe addressing scheme for the string data file is shown below.Table 2:Format ExplanationST String fileSTf:e.s f File number The valid file number range is from 3…255.: Element delimitere Element number The valid element number range is from 0…255.Each element is 42 words in length as shown in .. Subelement delimiters Subelement number The valid subelement number range is from 0…41.You can also specify .LEN for word 0 and .DATA[0] through .DATA[40] for words 1…41.Examples:ST9:2ST17:1.LENST13:7.DATA[1]The subelement represents a word address.String File 9, Element 2String File 17, Element 1, LEN VariableString File 13, Element 7, word 2 (characters 2 and 3)Publication 1766-RM001A-EN-P - October 2008